基于移相控制的谐振开关电容变换器占空比优化策略

doi:10.19595/j.cnki.1000-6753.tces.L90208

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摘要谐振开关电容变换器（RSCC）通常采用移相控制调节输出电压,但该方法易增大谐振电流峰值,影响RSCC效率。为此,该文提出一种基于移相控制的占空比优化策略,通过改变占空比实现零电压软开关,降低开关损耗。首先在RSCC移相控制调压原理分析基础上,采用状态轨迹法研究其软开关下的电压比范围;然后建立RSCC通用电压比模型,通过分析占空比对RSCC谐振特性影响规律,进而提出RSCC的占空比优化策略;最后通过实验结果表明,与传统移相控制相比,该文所提占空比优化策略可有效改善RSCC的软开关电压比范围,提高整机效率。

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	陈骞

关键词 ：谐振开关电容变换器, 移相控制, 状态轨迹, 软开关, 占空比优化, 效率

Abstract：The phase shift control is generally applied to resonant switched capacitor converter (RSCC) for voltage regulation purpose. But it tends to increase the peak resonant current and affect system efficiency. Thus a phase shift control based duty ratio optimization strategy is proposed to achieve zero voltage switching (ZVS). Firstly, by analyzing the voltage regulation principle of phase shift control, the conversion ratio range under soft switching are studied by the state trajectory method. Then the RSCC general conversion ratio model is established. By analyzing the influence of duty cycle on resonant characteristics of RSCC, the duty cycle optimization strategy is proposed. Experimental results show that, compared with traditional phase shift control, the duty cycle optimization strategy proposed in this paper can effectively improve the soft-switching conversion ratio range and the efficiency.

Key words： Resonant switched capacitor converter phase shift control state trajectory soft switching duty ratio optimization efficiency

收稿日期: 2020-07-02

PACS:

TM46

基金资助:国网浙江省电力有限公司科技项目（5211DS19003A）和国家自然科学基金重点项目（51737001）资助

通讯作者: 杨晓峰男,副教授,博士生导师,研究方向为多电平变换器技术、柔性直流输电技术、电力电子技术在轨道交通中的应用。E-mail: xfyang@bjtu.edu.cn

作者简介: 闫成章男,1996年生,硕士,研究方向为大功率电力电子变换器及其控制。E-mail: czhangyan@bjtu.edu.cn

引用本文:

闫成章, 杨晓峰, 刘妍, 温飘, 郑琼林, 陈骞. 基于移相控制的谐振开关电容变换器占空比优化策略[J]. 电工技术学报, 2021, 36(zk2): 676-687. Yan Chengzhang, Yang Xiaofeng, Liu Yan, Wen Piao, Zheng Thrillion Q, Chen Qian. Duty Cycle Optimization of Phase Shift Control Based on Resonant Switched Capacitor Converter. Transactions of China Electrotechnical Society, 2021, 36(zk2): 676-687.

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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.L90208 https://dgjsxb.ces-transaction.com/CN/Y2021/V36/Izk2/676

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